Title: Further insights into the chemistry of the Bi-U-O system
Authors: POPA KARINPRIEUR DAMIENMANARA DarioNAJI MOHAMEDVIGIER JEAN-FRANCOISMARTIN PhilippeDIESTE BLANCO OLIVERSCHEINOST AndreasPRUSSMANN TimVITOVA TonyaRAISON PhilippeSOMERS JosephKONINGS Rudy
Citation: DALTON TRANSACTIONS vol. 45 p. 7847-7855
Publisher: ROYAL SOC CHEMISTRY
Publication Year: 2016
JRC N°: JRC100300
ISSN: 1477-9226
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC100300
DOI: 10.1039/c6dt00735j
Type: Articles in periodicals and books
Abstract: Cubic fluorite-type phases have been reported in the UIVO2-Bi2O3 system for the entire compositional range, but an unusual non-linear variation of the lattice parameter with uranium substitution has been observed. In the current extensive investigation of the uranium(IV) oxide – bismuth (III) oxide system, this behaviour of the lattice parameter evolution with composition has been confirmed and its origin identified. Even under inert atmosphere at 800 oC, UIV oxidises to UV/UVI as a function of the substitution degree. Thus, using a combination of three methods (XRD, XANES and Raman) we have identified the formation of the BiUVO4 and Bi2UVIO6 compounds, within this series. Moreover, we present here the Rietveld refinement of BiUVO4 at room temperature and we report the thermal expansion of both BiUVO4 and Bi2UVIO6 compounds.
JRC Directorate:Nuclear Safety and Security

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